Sökning: onr:"swepub:oai:DiVA.org:kth-246566" > Effect of turbulenc...
Fältnamn | Indikatorer | Metadata |
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000 | 05252naa a2200697 4500 | |
001 | oai:DiVA.org:kth-246566 | |
003 | SwePub | |
008 | 190528s2018 | |||||||||||000 ||eng| | |
009 | oai:DiVA.org:su-158534 | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2465662 URI |
024 | 7 | a https://doi.org/10.1175/JAS-D-18-0081.12 DOI |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1585342 URI |
040 | a (SwePub)kthd (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Li, Xiang-Yungu KTH,Nordic Institute for Theoretical Physics NORDITA4 aut0 (Swepub:kth)u1vtdwlg |
245 | 1 0 | a Effect of turbulence on collisional growth of cloud droplets |
264 | 1 | b American Meteorological Society,c 2018 |
338 | a print2 rdacarrier | |
500 | a QC 20220323 | |
520 | a Weinvestigate the effect of turbulence on the collisional growth of micrometer-sized droplets through highresolution numerical simulations with well-resolved Kolmogorov scales, assuming a collision and coalescence efficiency of unity. The droplet dynamics and collisions are approximated using a superparticle approach. In the absence of gravity, we show that the time evolution of the shape of the droplet-size distribution due to turbulence-induced collisions depends strongly on the turbulent energy-dissipation rate ε, but only weakly on the Reynolds number. This can be explained through the « dependence of the mean collision rate described by the Saffman-Turner collision model. Consistent with the Saffman-Turner collision model and its extensions, the collision rate increases as ε1/2 even when coalescence is invoked. The size distribution exhibits power-law behavior with a slope of 23.7 from a maximum at approximately 10 up to about 40 mm. When gravity is invoked, turbulence is found to dominate the time evolution of an initially monodisperse droplet distribution at early times. At later times, however, gravity takes over and dominates the collisional growth. We find that the formation of large droplets is very sensitive to the turbulent energy dissipation rate. This is because turbulence enhances the collisional growth between similar-sized droplets at the early stage of raindrop formation. The mean collision rate grows exponentially, which is consistent with the theoretical prediction of the continuous collisional growth even when turbulence-generated collisions are invoked. This consistency only reflects the mean effect of turbulence on collisional growth. | |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Klimatforskning0 (SwePub)105012 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Climate Research0 (SwePub)105012 hsv//eng |
653 | a Clouds | |
653 | a Turbulence | |
653 | a Coalescence | |
653 | a Drops | |
653 | a Energy dissipation | |
653 | a Reynolds number | |
653 | a Size distribution | |
653 | a Collision and coalescence | |
653 | a Droplet dynamics | |
653 | a Droplet size distributions | |
653 | a High-resolution numerical simulation | |
653 | a Kolmogorov scale | |
653 | a Monodisperse droplets | |
653 | a Power-law behavior | |
653 | a Turbulent energy dissipation rate | |
653 | a cloud droplet | |
653 | a cloud microphysics | |
653 | a computer simulation | |
653 | a numerical model | |
653 | a power law | |
653 | a atmosfärvetenskap och oceanografi | |
700 | 1 | a Brandenburg, Axelu Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Nordiska institutet för teoretisk fysik (Nordita),Institutionen för astronomi,University of Colorado, USA4 aut0 (Swepub:su)brandenb |
700 | 1 | a Svensson, Gunillau Stockholms universitet,Meteorologiska institutionen (MISU),Swedish e-Science Research Centre, Sweden; Global & Climate Dynamics, National Center for Atmospheric Research, USA4 aut0 (Swepub:su)gsven |
700 | 1 | a Haugen, N. E. L.4 aut |
700 | 1 | a Mehlig, B.4 aut |
700 | 1 | a Rogachevskii, lgoru KTH,Nordic Institute for Theoretical Physics NORDITA4 aut0 (Swepub:kth)u1d6noho |
700 | 1 | a Li, Xiang-Yuu Stockholms universitet,Meteorologiska institutionen (MISU),Nordiska institutet för teoretisk fysik (Nordita),Swedish e-Science Research Centre, Sweden; University of Colorado, USA4 aut0 (Swepub:su)xili |
710 | 2 | a KTHb Nordic Institute for Theoretical Physics NORDITA4 org |
773 | 0 | t Journal of the Atmospheric Sciencesd : American Meteorological Societyg 75:10, s. 3469-3487q 75:10<3469-3487x 0022-4928x 1520-0469 |
856 | 4 | u https://doi.org/10.1175/JAS-D-18-0081.1y Fulltext |
856 | 4 | u https://arxiv.org/abs/1711.10062y arXiv:1711.10062 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246566 |
856 | 4 8 | u https://doi.org/10.1175/JAS-D-18-0081.1 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-158534 |
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